摘要
通过对HRB400E钢棒材轧制过程中堆钢样品宏观形貌进行观察,借助光学显微镜对堆钢样品横截面的形貌、组织进行检验,认为是因铸坯中间裂纹在端部裸露,加热炉加热过程中裂纹两侧氧化,在轧制过程中头部劈裂,轧机不能正常咬入,进而造成堆钢事故。在此分析基础上,改进了连铸二冷冷却强度,铸坯内部质量得到改善,杜绝了因铸坯内部质量导致的堆钢事故。
Macro-morphology of steel heap sample during HRB400E bar rolling was observed,and morphology and structure of cross section of stacked steel sample were examined by optical microscope.It was considered that,the reason for causing steel heap accident was that the middle crack of billet was exposed at the end,the crack was oxidized on both sides during heating furnace,the head was split during rolling,and the rolling mill couldn’t bite in normally.Based on the analysis results above,the secondary cooling intensity of continuous casting was improved,the internal quality of slab was improved,and the steel heap accident caused by the internal quality of slab was eliminated.
作者
孙江波
翟晓毅
徐斌
陈晓辉
SUN Jiangbo;ZHAI Xiaoyi;XU Bin;CHEN Xiaohui(Handan Branch of Hebei Iron&Steel Co.,Ltd.,Handan 056015,China)
出处
《炼钢》
CAS
北大核心
2019年第5期54-56,62,共4页
Steelmaking
关键词
HRB400E钢
堆钢
中间裂纹
冷却强度
HRB400E steel
steel-heaping
intermediate crack
cooling intensity
